Bosio V, Viera M, Donati E
Centro de Investigación y Desarrollo de Fermentaciones Industriales (CINDEFI), Departamento de Química, Universidad Nacional de La Plata-Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), 50 y 115, 1900 La Plata, Argentina.
J Hazard Mater. 2008 Jun 15;154(1-3):804-10. doi: 10.1016/j.jhazmat.2007.10.095. Epub 2007 Nov 4.
Integrated biological processes involving the dissolution and subsequent precipitation have been used for the treatment of the spent material from the hydrogenation of vegetable oil containing a high-level of nickel. Our results show that nickel was successfully leached using Acidithiobacillus thiooxidans. The percentages of nickel leached using A. thiooxidans were higher than those obtained with dilute sulphuric acid solutions. Due to the physical characteristics of the residue, the best results were obtained when the leaching process was carried out using sulphuric acid biogenerated by an A. thiooxidans biofilm. The recovery of nickel from the leachates was performed at room temperature by precipitating with sulphide generated by Desulfovibrio cells. Indirect precipitation using sulphide generated in Desulfovibrio sp. cultures allowed the recovery of nickel as the very insoluble nickel sulphide.
涉及溶解及后续沉淀的综合生物过程已被用于处理来自植物油氢化过程中含有高含量镍的废料。我们的结果表明，利用氧化硫硫杆菌成功浸出了镍。使用氧化硫硫杆菌浸出的镍的百分比高于用稀硫酸溶液获得的百分比。由于残渣的物理特性，当使用氧化硫硫杆菌生物膜产生的硫酸进行浸出过程时，可获得最佳结果。通过用脱硫弧菌细胞产生的硫化物沉淀，在室温下从浸出液中回收镍。使用脱硫弧菌属培养物中产生的硫化物进行间接沉淀，可将镍回收为极难溶的硫化镍。
